Cold water infusing leaf tea
US6482450B1 · kind B1 · utility
10Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2000 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Feb 7, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/114998
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
A method for preparing a cold water infusing leaf tea. Green tea leaves are macerated, treated with tannase, fermented in the presence of hydrogen peroxide in an amount that is sufficient to activate endogenous peroxidases to oxidise gallic acid and other compounds that are liberated by the tannase treatment, and then dried. The final product is a black leaf tea that infuses in hot or cold water to give good flavour and colour.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.